At least one Enterprise rental place has a cheat sheet for manipulating buyers into buying what is sometimes unnecessary car insurance. Here’s a transcript of the document one of our readers snagged from an Enterprise in Fort Lee, NJ .

You may have missed it, but a number of national car-rental places amended or ended their car-rental grace periods this year. These were rules that said if you returned your car an hour or two late, they wouldn’t charge you for the overtime.

A couple weeks ago, I reserved a compact with Dollar Rent-a-Car in San Antonio. At the counter, the agent flat-out lied to me about what kind of car I was scheduled to get, in an attempt to upsell me to a higher class of vehicle.

One of the problems with travel bidding sites such as Priceline and Hotwire is that you’re betting blind. The house has all the stats, has already determined what they’re going to pay and it’s up to you to guess what might work.